21773363364 has 27 divisors (see below), whose sum is σ = 55040462113. Its totient is φ = 7257492672.

The previous prime is 21773363327. The next prime is 21773363369. The reversal of 21773363364 is 46336337712.

The square root of 21773363364 is 147558.

It is a perfect power (a square), and thus also a powerful number.

21773363364 is a `hidden beast` number, since 2 + 1 + 7 + 7 + 3 + 3 + 633 + 6 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2115080100 + 19658283264 = 45990^2 + 140208^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21773363369) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 873052 + ... + 897644.

Almost surely, 2^21773363364 is an apocalyptic number.

21773363364 is the 147558-th square number.

It is an amenable number.

21773363364 is an abundant number, since it is smaller than the sum of its proper divisors (33267098749).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21773363364 is an frugal number, since it uses more digits than its factorization.

21773363364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49196 (or 24598 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 45.

The spelling of 21773363364 in words is "twenty-one billion, seven hundred seventy-three million, three hundred sixty-three thousand, three hundred sixty-four".